max_pending_* server settings - ClickHouse Documentation

These settings configure the ClickHouse server and are autogenerated from ClickHouse source.

max_pending_mutations_execution_time_to_warn

If any of the pending mutations exceeds the specified value in seconds, clickhouse server will add warning messages to system.warnings table. Example

<max_pending_mutations_execution_time_to_warn>10000</max_pending_mutations_execution_time_to_warn>

max_pending_mutations_to_warn

If the number of pending mutations exceeds the specified value, clickhouse server will add warning messages to system.warnings table. Example

<max_pending_mutations_to_warn>400</max_pending_mutations_to_warn>

Last modified on July 23, 2026